Mercurial > dive4elements > river

annotate artifacts/src/main/java/org/dive4elements/river/exports/ChartInfoGenerator.java @ 5838:5aa05a7a34b7

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Rename modules to more fitting names.
author Sascha L. Teichmann <teichmann@intevation.de>
date Thu, 25 Apr 2013 15:23:37 +0200
parents flys-artifacts/src/main/java/org/dive4elements/river/exports/ChartInfoGenerator.java@bd047b71ab37
children 4897a58c8746
rev   line source
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1 package org.dive4elements.river.exports;
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3 import org.dive4elements.river.collections.FLYSArtifactCollection;
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4 import org.dive4elements.river.java2d.NOPGraphics2D;
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5
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6 import java.io.IOException;
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7 import java.io.OutputStream;
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8
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9 import java.awt.Transparency;
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10 import java.awt.Graphics2D;
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11
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12 import java.awt.geom.Rectangle2D;
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13
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14 import java.awt.image.BufferedImage;
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15
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16 import org.w3c.dom.Document;
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17
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18 import org.apache.log4j.Logger;
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20 import org.jfree.chart.ChartRenderingInfo;
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21 import org.jfree.chart.JFreeChart;
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22
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23 import org.dive4elements.artifacts.Artifact;
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24 import org.dive4elements.artifacts.CallContext;
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26 import org.dive4elements.artifactdatabase.state.ArtifactAndFacet;
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27 import org.dive4elements.artifactdatabase.state.Settings;
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29 import org.dive4elements.artifacts.common.utils.XMLUtils;
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31
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32 /**
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33 * An OutGenerator that generates meta information for charts. A concrete
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34 * ChartInfoGenerator need to instantiate a concrete ChartGenerator and dispatch
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35 * the methods to that instance. The only thing this ChartInfoGenerator needs
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36 * to, is to overwrite the generate() method which doesn't write the chart image
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37 * to the OutputStream but a Document that contains some meta information of the
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38 * created chart.
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39 *
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40 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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41 */
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42 public abstract class ChartInfoGenerator implements OutGenerator {
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43
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44 public static final boolean USE_NOP_GRAPHICS =
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45 Boolean.getBoolean("info.rendering.nop.graphics");
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46
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47 /** The logger used in this generator.*/
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48 private static Logger logger =
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49 Logger.getLogger(ChartInfoGenerator.class);
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50
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51
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52 /** The OutGenerator that creates the charts.*/
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53 protected ChartGenerator generator;
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54
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55 protected OutputStream out;
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58
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59 public ChartInfoGenerator(ChartGenerator generator) {
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60 this.generator = generator;
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61 }
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62
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63
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64 /**
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65 * Dispatches the operation to the instantiated generator.
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66 *
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67 * @param request
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68 * @param out
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69 * @param context
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70 */
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71 public void init(Document request, OutputStream out, CallContext context) {
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72 this.out = out;
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73
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74 generator.init(request, out, context);
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75 }
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78 /**
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79 * Dispatches the operation to the instantiated generator.
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80 *
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81 * @param master The master artifact
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82 */
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83 public void setMasterArtifact(Artifact master) {
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84 generator.setMasterArtifact(master);
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85 }
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87
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88 /**
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89 * Dispatches the operation to the instantiated generator.
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90 *
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91 * @param collection The collection.
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92 */
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93 public void setCollection(FLYSArtifactCollection collection) {
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94 generator.setCollection(collection);
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95 }
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98 /**
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99 * Dispatches the operation to the instantiated generator.
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100 */
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101 public void doOut(
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102 ArtifactAndFacet artifactFacet,
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103 Document attr,
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104 boolean visible
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105 ) {
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106 generator.doOut(artifactFacet, attr, visible);
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107 }
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108
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109
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110 /**
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111 * This method generates the chart using a concrete ChartGenerator but
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112 * doesn't write the chart itself to the OutputStream but a Document that
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113 * contains meta information of the created chart.
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114 */
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115 @Override
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116 public void generate()
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117 throws IOException
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118 {
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119 logger.debug("ChartInfoGenerator.generate");
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120
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121 JFreeChart chart = generator.generateChart();
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122
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123 int[] size = generator.getSize();
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124 if (size == null) {
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125 size = generator.getDefaultSize();
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126 }
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127
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128 ChartRenderingInfo info = new ChartRenderingInfo();
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129
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130 long startTime = System.currentTimeMillis();
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131
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132 if (USE_NOP_GRAPHICS) {
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133 BufferedImage image =
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134 new BufferedImage(size[0], size[1], Transparency.BITMASK);
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135
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136 Graphics2D g2d = image.createGraphics();
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137 Graphics2D nop = new NOPGraphics2D(g2d);
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138
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139 chart.draw(
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140 nop,
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141 new Rectangle2D.Double(0, 0, size[0], size[1]),
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142 null,
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143 info);
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144
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145 nop.dispose();
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146 }
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147 else {
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148 chart.createBufferedImage(
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149 size[0], size[1], Transparency.BITMASK, info);
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150 }
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151
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152 long stopTime = System.currentTimeMillis();
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153
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154 if (logger.isDebugEnabled()) {
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155 logger.debug("Rendering info took: " +
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156 (stopTime-startTime) + "ms");
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157 }
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158
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159
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160 InfoGeneratorHelper helper = new InfoGeneratorHelper(generator);
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161 Document doc = helper.createInfoDocument(chart, info);
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162
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163 XMLUtils.toStream(doc, out);
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164 }
1979
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165
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166
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167 /**
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168 * A proxy method which calls <i>generator</i>.getSettings() and returns its
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169 * return value.
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170 *
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171 * @return a Settings object provided by <i>generator</i>.
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172 */
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173 @Override
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174 public Settings getSettings() {
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175 return generator.getSettings();
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176 }
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177
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178
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179 /**
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180 * A proxy method which calls <i>generator</i>.setSettings().
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181 *
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182 * @param settings A settings object for the <i>generator</i>.
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183 */
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184 @Override
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185 public void setSettings(Settings settings) {
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186 generator.setSettings(settings);
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187 }
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188 }
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189 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org